3-[2-(2-Bromo-thiophen-3-yl)-ethyl]-3-methyl-6-oxo-cyclohexa-1,4-dienecarboxylic acid methyl ester 在
三氯化铝 作用下,
以
乙醚 为溶剂,
反应 2.0h,
以80%的产率得到(5aR,9aS)-3-Bromo-5a-methyl-8-oxo-4,5,5a,8,9,9a-hexahydro-naphtho[1,2-c]thiophene-9-carboxylic acid methyl ester